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1 package org.ashkelon.pages;
2
3 import org.ashkelon.*;
4 import org.ashkelon.util.*;
5 import org.ashkelon.db.*;
6
7 import java.sql.*;
8 import org.apache.oro.util.*;
9
10
11
14 public class ClassPage extends Page
15 {
16 public ClassPage()
17 {
18 super();
19 }
20
21 public String  handleRequest() throws SQLException, ClassNotFoundException
22 {
23 int clsId = 0;
24 try
25 {
26 clsId = Integer.parseInt(ServletUtils.getRequestParam(request, "cls_id"));
27 }
28 catch (NumberFormatException ex)
29 {
30 String clsName = ServletUtils.getRequestParam(request, "cls_name");
31
32 String sql = DBMgr.getInstance().getStatement("getclassid");
33 PreparedStatement pstmt = conn.prepareStatement(sql);
34 pstmt.setString(1, clsName);
35 ResultSet rset = pstmt.executeQuery();
36 if (rset.next())
37 clsId = rset.getInt(1);
38 rset.close();
39 pstmt.close();
40 }
41
42 Integer clsId_obj = new Integer (clsId);
43
44
45 Object classCacheObj = app.getAttribute("classCache");
46 CacheLRU classCache = null;
47 if (classCacheObj == null)
48 {
49 classCache = new CacheLRU(1000);
50 }
51 else
52 {
53 classCache = (CacheLRU) classCacheObj;
54 Object clsobject = classCache.getElement(clsId_obj);
55 if (clsobject!=null)
56 {
57 ClassType cls = (ClassType) clsobject;
58 log.brief("retrieving "+cls.getName()+" from cache");
59 request.setAttribute("cls", cls);
60 TreeNode superclasses = cls.getSuperclasses(conn);
61 request.setAttribute("tree", superclasses);
62 return null;
63 }
64 }
65
66 ClassType cls = ClassType.makeClassFor(conn, clsId, true);
67
68 classCache.addElement(clsId_obj, cls);
69 app.setAttribute("classCache", classCache);
70
71 request.setAttribute("cls", cls);
72 TreeNode superclasses = cls.getSuperclasses(conn);
73 request.setAttribute("tree", superclasses);
74 return null;
75 }
76
77 }
78 |
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